|
| 1 | +import { createIterablePromise } from '../createIterablePromise'; |
| 2 | + |
| 3 | +describe('createIterablePromise', () => { |
| 4 | + describe('func', () => { |
| 5 | + it('provides the `previousResponse` parameter', async () => { |
| 6 | + const responses: Array<string | undefined> = []; |
| 7 | + const promise = createIterablePromise<string | undefined>({ |
| 8 | + func: (previousResponse) => { |
| 9 | + return new Promise((resolve) => { |
| 10 | + resolve(previousResponse === undefined ? 'yes' : 'no'); |
| 11 | + }); |
| 12 | + }, |
| 13 | + validate: () => responses.length === 3, |
| 14 | + aggregator: (response) => responses.push(response), |
| 15 | + }); |
| 16 | + |
| 17 | + await expect(promise).resolves.toEqual('no'); |
| 18 | + expect(responses).toEqual(['yes', 'no', 'no']); |
| 19 | + }); |
| 20 | + }); |
| 21 | + |
| 22 | + describe('validate', () => { |
| 23 | + it('iterates on a `func` until `validate` is met', async () => { |
| 24 | + let calls = 0; |
| 25 | + const promise = createIterablePromise({ |
| 26 | + func: () => { |
| 27 | + return new Promise((resolve) => { |
| 28 | + calls += 1; |
| 29 | + resolve(`success #${calls}`); |
| 30 | + }); |
| 31 | + }, |
| 32 | + validate: () => calls >= 3, |
| 33 | + }); |
| 34 | + |
| 35 | + await expect(promise).resolves.toEqual('success #3'); |
| 36 | + expect(calls).toBe(3); |
| 37 | + }); |
| 38 | + |
| 39 | + it('forward the response of the `func`', async () => { |
| 40 | + let calls = 0; |
| 41 | + const promise = createIterablePromise<number>({ |
| 42 | + func: () => { |
| 43 | + return new Promise((resolve) => { |
| 44 | + calls += 1; |
| 45 | + resolve(calls); |
| 46 | + }); |
| 47 | + }, |
| 48 | + validate: (response) => response >= 3, |
| 49 | + }); |
| 50 | + |
| 51 | + await expect(promise).resolves.toEqual(3); |
| 52 | + expect(calls).toBe(3); |
| 53 | + }); |
| 54 | + }); |
| 55 | + |
| 56 | + describe('aggregator', () => { |
| 57 | + it('is called before iterating', async () => { |
| 58 | + let calls = 0; |
| 59 | + let count = 0; |
| 60 | + const promise = createIterablePromise({ |
| 61 | + func: () => { |
| 62 | + return new Promise((resolve) => { |
| 63 | + calls += 1; |
| 64 | + resolve(`success #${calls}`); |
| 65 | + }); |
| 66 | + }, |
| 67 | + validate: () => calls >= 3, |
| 68 | + aggregator: () => (count += 3), |
| 69 | + }); |
| 70 | + |
| 71 | + await expect(promise).resolves.toEqual('success #3'); |
| 72 | + expect(calls).toBe(3); |
| 73 | + expect(count).toBe(3 * 3); |
| 74 | + }); |
| 75 | + |
| 76 | + it('forward the response of the `func`', async () => { |
| 77 | + let calls = 0; |
| 78 | + const responses: string[] = []; |
| 79 | + const promise = createIterablePromise<string>({ |
| 80 | + func: () => { |
| 81 | + return new Promise((resolve) => { |
| 82 | + calls += 1; |
| 83 | + resolve(`success #${calls}`); |
| 84 | + }); |
| 85 | + }, |
| 86 | + validate: () => calls >= 3, |
| 87 | + aggregator: (response) => { |
| 88 | + responses.push(response); |
| 89 | + }, |
| 90 | + }); |
| 91 | + |
| 92 | + await expect(promise).resolves.toEqual('success #3'); |
| 93 | + expect(calls).toBe(3); |
| 94 | + expect(responses).toEqual(['success #1', 'success #2', 'success #3']); |
| 95 | + }); |
| 96 | + }); |
| 97 | + |
| 98 | + describe('timeout', () => { |
| 99 | + it('defaults to no timeout (0)', async () => { |
| 100 | + let calls = 0; |
| 101 | + const before = Date.now(); |
| 102 | + const promise = createIterablePromise({ |
| 103 | + func: () => { |
| 104 | + return new Promise((resolve) => { |
| 105 | + calls += 1; |
| 106 | + resolve(`success #${calls}`); |
| 107 | + }); |
| 108 | + }, |
| 109 | + validate: () => calls >= 2, |
| 110 | + }); |
| 111 | + |
| 112 | + await expect(promise).resolves.toEqual('success #2'); |
| 113 | + |
| 114 | + expect(Date.now() - before).toBeGreaterThanOrEqual(0); |
| 115 | + expect(Date.now() - before).toBeLessThan(10); |
| 116 | + expect(calls).toBe(2); |
| 117 | + }); |
| 118 | + |
| 119 | + it('waits before calling the `func` again', async () => { |
| 120 | + let calls = 0; |
| 121 | + const before = Date.now(); |
| 122 | + const promise = createIterablePromise({ |
| 123 | + func: () => { |
| 124 | + return new Promise((resolve) => { |
| 125 | + calls += 1; |
| 126 | + resolve(`success #${calls}`); |
| 127 | + }); |
| 128 | + }, |
| 129 | + validate: () => calls >= 2, |
| 130 | + timeout: () => 2000, |
| 131 | + }); |
| 132 | + |
| 133 | + await expect(promise).resolves.toEqual('success #2'); |
| 134 | + |
| 135 | + expect(Date.now() - before).toBeGreaterThanOrEqual(2000); |
| 136 | + expect(Date.now() - before).toBeLessThan(2010); |
| 137 | + expect(calls).toBe(2); |
| 138 | + }); |
| 139 | + }); |
| 140 | + |
| 141 | + describe('error', () => { |
| 142 | + it('gets the rejection of the given promise via reject', async () => { |
| 143 | + let calls = 0; |
| 144 | + |
| 145 | + const promise = createIterablePromise({ |
| 146 | + func: () => { |
| 147 | + return new Promise((resolve, reject) => { |
| 148 | + calls += 1; |
| 149 | + if (calls <= 3) { |
| 150 | + resolve('okay'); |
| 151 | + } else { |
| 152 | + reject(new Error('nope')); |
| 153 | + } |
| 154 | + }); |
| 155 | + }, |
| 156 | + validate: () => false, |
| 157 | + }); |
| 158 | + |
| 159 | + await expect(promise).rejects.toEqual( |
| 160 | + expect.objectContaining({ message: 'nope' }) |
| 161 | + ); |
| 162 | + }); |
| 163 | + |
| 164 | + it('gets the rejection of the given promise via throw', async () => { |
| 165 | + let calls = 0; |
| 166 | + |
| 167 | + const promise = createIterablePromise({ |
| 168 | + func: () => { |
| 169 | + return new Promise((resolve) => { |
| 170 | + calls += 1; |
| 171 | + if (calls <= 3) { |
| 172 | + resolve('okay'); |
| 173 | + } else { |
| 174 | + throw new Error('nope'); |
| 175 | + } |
| 176 | + }); |
| 177 | + }, |
| 178 | + validate: () => false, |
| 179 | + }); |
| 180 | + |
| 181 | + await expect(promise).rejects.toEqual( |
| 182 | + expect.objectContaining({ message: 'nope' }) |
| 183 | + ); |
| 184 | + }); |
| 185 | + |
| 186 | + it('rejects with the given `message` when `validate` hits', async () => { |
| 187 | + const MAX_RETRIES = 3; |
| 188 | + let calls = 0; |
| 189 | + |
| 190 | + const promise = createIterablePromise({ |
| 191 | + func: () => { |
| 192 | + return new Promise((resolve) => { |
| 193 | + calls += 1; |
| 194 | + resolve('okay'); |
| 195 | + }); |
| 196 | + }, |
| 197 | + validate: () => false, |
| 198 | + error: { |
| 199 | + validate: () => calls >= MAX_RETRIES, |
| 200 | + message: () => `Error is thrown: ${calls}/${MAX_RETRIES}`, |
| 201 | + }, |
| 202 | + }); |
| 203 | + |
| 204 | + await expect(promise).rejects.toEqual( |
| 205 | + expect.objectContaining({ |
| 206 | + message: 'Error is thrown: 3/3', |
| 207 | + }) |
| 208 | + ); |
| 209 | + expect(calls).toBe(MAX_RETRIES); |
| 210 | + }); |
| 211 | + |
| 212 | + it('forward the response of the `func`', async () => { |
| 213 | + const MAX_RETRIES = 3; |
| 214 | + let calls = 0; |
| 215 | + |
| 216 | + const promise = createIterablePromise<number>({ |
| 217 | + func: () => { |
| 218 | + return new Promise((resolve) => { |
| 219 | + calls += 1; |
| 220 | + resolve(calls); |
| 221 | + }); |
| 222 | + }, |
| 223 | + validate: () => false, |
| 224 | + error: { |
| 225 | + validate: (response) => response >= MAX_RETRIES, |
| 226 | + message: (response) => `Error is thrown: ${response}/${MAX_RETRIES}`, |
| 227 | + }, |
| 228 | + }); |
| 229 | + |
| 230 | + await expect(promise).rejects.toEqual( |
| 231 | + expect.objectContaining({ |
| 232 | + message: 'Error is thrown: 3/3', |
| 233 | + }) |
| 234 | + ); |
| 235 | + expect(calls).toBe(MAX_RETRIES); |
| 236 | + }); |
| 237 | + }); |
| 238 | +}); |
0 commit comments